1 Feb 2007 11:07

## Question about the H.248.19 property - volume level for video swithing

The below defines the volume level for video swithing:

12.1.1.2    Property Name: Volume Level for Video Switching

PropertyID:                                          vollevvidsw, 0x0002

Description:                                                      This property indicates the volume level that, when equalled or exceeded, the MP considers the associated termination/stream to be the active speaker.

Type:                                                                Integer

Possible values:                                     0-100 decibels.

Default:                                                             Provisioned

Our energy threshold can get values between 0 dBm to -39 dBm, where 0 dBm refer to quarter of digital full scale in Q15 notation, thus 0x2000.

How should one convert the 0 – 100 decibels to the above scale? It seems to us that 100 decibels is a very high level.

Thanks,

Email: nurits <at> audiocodes.com

Tel.  +972-3-9764155

Fax. +972-3-9764223

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5 Feb 2007 06:43

### Re: Question about the H.248.19 property - volume level for video swithing

Hello Nurit,

I agree 100 is very high. I don't think anybody has a jet engine
attached to their MG. In packages you are not required to support all
the values of a property. However we didn't want to set the value range
from 0-20dB as this would limit your implementation. So if your MG only
supports 0 - 39dB its OK that's what you use as the values.

Regards, Christian

Nurit Shenhar wrote:
>
> The below defines the volume level for video swithing:
>
> *12.1.1.2 Property Name:* Volume Level for Video Switching**
>
> PropertyID: vollevvidsw, 0x0002
>
> Description: This property indicates the volume level that, when
> equalled or exceeded, the MP considers the associated
> termination/stream to be the active speaker.
>
> Type: Integer
>
> Possible values: 0-100 decibels.
>
> Default: Provisioned
>
> Our energy threshold can get values between 0 dBm to -39 dBm, where 0
> dBm refer to quarter of digital full scale in Q15 notation, thus 0x2000.
>
> How should one convert the 0 – 100 decibels to the above scale? It
> seems to us that 100 decibels is a very high level.
>
> Thanks,
>
> *//**/Nurit Shenhar/*
>
> /H.248&MGCP Team Leader/
>
> **
>
> *** *
>
> Email: nurits <at> audiocodes.com
>
> Tel. +972-3-9764155
>
> Fax. +972-3-9764223
>
> ___www.audiocodes.com_ <http://www.audiocodes.com/>
>
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Gmane